單項選擇題2,6,15,30,45,()

A.63
B.57
C.51
D.45


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1.單項選擇題3,13,53,129,247,()

A.413
B.365
C.498
D.516

2.單項選擇題44,52,68,76,92,()

A.104
B.116
C.124
D.128

3.單項選擇題2,-2,6,-10,22,()

A.-36
B.-40
C.-42
D.46

4.單項選擇題15,26,35,50,63,()

A.74
B.78
C.82
D.90

5.單項選擇題9,35,79,141,221,()

A.357
B.319
C.303
D.251